I definitely agree with you. " As an aside, may I ask if this is the only definition Longman gives? I have a somewhat different sense of the term, but I may well be wrong.
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AvangiVery che-che!
CliveI've always spelled and read that term as 'chi-chi'.I can't remember ever having seen that actually written. But the pronunciation I've heard in conversation in my neck of the woods sounds like a repetition of the word "she" -- i.e. she-she.